Heating device



L. 8. BROWN HEATING DEVICE Nov. 26, 1929.

Filed July 18 1927 \/3 \NVENTOR TIII Pa tented Nov. 26, 1929 LUTHER 8. BROWN, 01 FRESNO, CALIFORNIA 4 HEATING DEVICE Application filed July 18, 1927. Serial No. 206,767.

My invention relates to heating devices used for heating buildings, residences and the like and it has for its prime object the provision of acbnstruction whereby the ex- 5 pansion of the air as it is heated is caused to create a forced draft through the air passages thus causing a continuous circulation of air through the room or rooms being heated, the air being reheated continuously,

19 without the use of an air circulating or propelling device of any nature.

Another object is to provide heating devices of the above character which will produce the maximum heat with the minimum consumption of fuel, and which will be simple in construction and operation and of a maximum of efficiency.

Other objects and advantages will appear hereinafter and while I have shown and will describe the preferred form of my invention it will be understood that I do not lmit myself to such preferred form but that various changes and adaptions may be made therein without departing from the spirit of my invention.

In the drawings accompanying and forming a part hereof:

Fig. 1 is a central vertical section through my device as adapted for a floor furnace.

a Fig. 2 is a section on the line 22 of Fig. 1. Fig. 3 is a section on the line 3-3 of Fi 2. Referring to the drawings of -my 001 furnace (Figs. 1 to 3 inclusive) my furnace comprises an outer casing 10 closed at the I bottom and open at the top. Surrounding the upper edges of casing 10 is a rightangled flange 11 which normally rests upon the floor of the room in .which it is positioned.

Mounted within casin 10, and supported at a suitable distance above the bottom of said outer casing is a rectangular open ended casing 12 the walls of which casing are spaced a suflicient distance from the walls of casing 10 to'form an air passage therebetween. The bottom wall of casing 10 is closed and supported at a distance above said bottom wall are a plurality of burner chamo bers 13 which extend upwardly to near the top of said casing. The lower ends of these burner c hambers arelarger than the upper ends and at the bottom of these lar er portions are mountedthe burners 14 which are of the tubular type although any other type may be used. Burner chambers 13 are equally spaced apart transversely of casing 12 and their outer walls form air passages 15 shaped reversely to the burner chambers 13; The burner chambers 13 extend nearly from end to end of casing 12 and are connected at their upper ends by passages 15 to a common header to so connect the valves for the center and each of the outside burners so that they all may be opened together, and that the valves for the remaining two burners may be also operated together but independently of the first three burners thus permittin the use of either two or three burners or a l five burners together, thus giving three different degrees of heating capacity. The burners may be arranged to be controlled from above the floor or in any other suitable location.

The object of the peculiar sha e of'the burner chambers, being larger at t e bottom than that at the top, is to retard the escape of the heat generated by the burners along the narrow portions to compel the maximum radiation through the walls of these narrow portions which walls form the walls of the expansion chambers at the upper ends of the air passages 15. Ki The cold air' enters the airpassages 15 at the bottom thereof at ,the narrower portions and as the air emerges from the narrow portion of these air passages into the wide rtions it becomes heated and expands rapidly forcing itself out of the upper ends 0 the air passages, throu h the up rend of the outer casing 10 an in so oing creates a partial vacuum at the bottom of the ex ansion chambers which causes the cold an to be drawn upwardly through the narrow portions very rapidly. A shutter 25. is provided for the bottom wall of the outer casing 10 the purpose of which is to admit fresh air to enter said casing when desired.

In the operation of this form of my device when the furnace is in use the air will be drawn from near the floor of the room in which it is used downwardly through the ,air passages 22 between the inner and outer verted into a basement furnace with very slight variation in construction.

Spark plug 20 is usedto light the gas in the burners, or any other means desired may be used for lighting purposes.

Door 24 is used for gaining entrance to chamber containing spark!- plug 20v'alve 22-air mixing chamber 19 for adjustments.

Having described my invention what I claim is:

1. A furnace of the character described comprising two rectangular casings mounted one within the other but spaced apart, the upper ends of said casings being open to atmosphere, the lower end of the outer casing being normally closed and the lower end of the inner casing being open and terminating at a distance above the bottom wall of the outer casing; a plurality of heat chambers mounted within said inner casing in spaced relation and forming a plurality of hot air passages therethrough, said heat chambers being wider at the bottom than at the top whereby the upper ends of said air passages form ea ansion chambers and the upper ends of said heat chambers act to retard the passage of heat therethroughto-permit maximum radiation; an outlet drum to the upper end of which the upper ends of said heat caslngs are connected; a fume outlet from the lower end of said drum; an independently controlled burner in each of said heat chambers and remotely controlled electrically operated means for igniting said burners.

2. A floor furnace having outer and inner inclosing casings spaced to form air inlets; a plurality of heat chambers mounted within said inner casing in spaced relation and having burners mounted in their lower ends, each of said heat chambers being closed at its lower end and having its upper end connected to the upper end of an outlet drum, the

upper portion of each of said heat chambersbeing narrowed to retard the passage of heat therethrough and a flue outlet from the lower end of said outlet drum.

3. A floor furnace comprising an outer rectangular casing open at its upper end and having an opening in its bottom wall and an ad ustable closure for said opening; an 1nner casmg mounted within said outer casing but spaced therefrom and a plurality of relatively narrow heat chambers mounted within said inner casing in spaced relation and forming a plurality of hot air passages therebetween, each of said heat chambers being closed at its lower end and having a burner mounted therein and being narrowed from a distance above said burners upwardly to retard the passage of heat therethrough; an outlet drum, to the upper end of which the upper ends of said heat chambers are connected; a fume outlet from the lower end of said drum and an independent control for each of said burners' 4. A furnace comprising two substantially rectangular casings mounted, one within the other in spaced relation, said casings having their upper ends opening to atmosphere, and

the inner casing with its lower end terminating a short distance above the bottom wall of the outer casing and opening thereinto; a plurality of relatively narrow heat chambers mounted within said inner casing in spaced relation and forming a plurality of hot'air passages therebetween, said heat chambers having their lower ends closed and their upper ends connected to a common fume outlet and being narrower at the top than at the bottom to retard the a'ssage of heat therethrough, and indepen ent fuel controls for each of said burners.

5. A floor furnace having inner and outer inclosing casings spaced to form air inlets; a plurality of heat chambers mounted within said inner casing in spaced-relation and forming a pluralityof hot air passages therebetween; burners mounted in the lower ends of said heat chambers; a fume outlet from the upper endsof said heat chambers; and remotely controlled electrically operated means for igniting said burners.

6. A floor furnace having inner and outer inclosing casings spaced to form air inlets, a plurahty of heat chambers mounted within said inner casing in s aced relation and forming .a plurality of ot air passages therethrough, said heat chambers being narrower at the top than at the bottom whereby the passage of heat therethrough is retarded and said hot air passages formed larger at the top than at the bottom, said heat chambers a into'; a plurality of relatively narrow heat chambers mounted Within said inner casing in spaced relation and forming a plurality of relatively narrow hot air passages therebetween, said heat chambers having their lower ends closed and having a burner mounted therein, and having their upper ends connected to a common fume outlet, said heat chambers having less area at the top than at the bottom and said hot air passages having greater area at the top than at the bottom.

8. A furnace comprising an outer and an inner casing spaced to form air inlets; a plurality of heat chambers mounted Within said inner casing and forming a plurality of hot air passages theretjhrough, said heat chambers being smaller at the top than at the bottom and said hot air passages being smaller at. the bottom than at the top.

In Witness that I claim the foregoing I have hereunto subscribed my name this 17th day of July, 1926. LUTHER S. BROWN. 

